A method and device for ventilating and temperature controlling rooms

ABSTRACT

The invention relates to a method for ventilating and temperature controlling rooms according to the principle of dilution ventilation, wherein a primary air flow ( 40 ) is introduced into the ceiling cavity ( 30 ) of a room ( 4 ), which is partitioned from a story ceiling ( 26 ) by a false ceiling ( 31 ) and is introduced into the room ( 4 ) by means of porosities ( 41, 42, 43 ) in the false ceiling ( 31 ), wherein the primary air flow ( 40 ) in the ceiling cavity ( 30 ) produces a secondary air flow ( 33 ) as an induction air flow, which vacuums a room air flow ( 32 ) from the room ( 4 ) into the ceiling cavity ( 30 ), mixes with the secondary air flow ( 33 ) and introduces it into the room ( 4 ) as a tertiary air flow ( 34 ) through the porosities ( 41, 42, 43 ) in the false ceiling ( 31 ).

The invention relates to a method and a device for ventilating and temperature controlling rooms in accordance with the preamble of patent claim 1.

Such a method and associated device has been known, for example, from the subject of EP 1 325 268 B1. With this known device, cooled fresh air is blown into the ceiling cavity of a room that is to be temperature controlled, escapes into each of the slit-shaped, ceiling-side connections of the false ceiling to each room wall in the room.

The disadvantage of this arrangement is that undesirable drafts occur on the ceiling connection side of the room wall and unpleasant temperature differences also specifically occur in the room itself, because the air outlet at the ceiling connection on the room wall side differs greatly in comparison to the center of the room.

With the subject of DE 40 15 665 C3, an induction air flow is generated in the ceiling cavity, which consists of a primary air flow, which is guided along the upper side of the false ceiling to the false ceiling and flows to the wall side of a room through bordering elements being on the ceiling connection side in the room. The room air is extracted through exhaust fans below the false ceiling. With this method, the disadvantage is that the primary air cannot be injected with a low temperature, because there is no prior mixing with the room air.

With a device according to DE 43 08 969 C1, the admixture of primary air being provided with cooled air occurs in an air duct running lengthways parallel to the room ceiling, wherein the primary air emitted from the air duct is fed along the ceiling. No mixing with the room air occurs, because the ceiling cavity is only used for the air mixture of the primary air flow over the surface of the suspended ceiling, but no admixture of room air takes place. Thus, there is the disadvantage that the room air is not temperature controlled due to the absent admixture of room air into the primary air flow.

With the subject of DE 100 64 939 C2, a method and a device used for this are described, consisting of an exhaust fan, which injects the primary air parallel to the story ceiling into an aeration device, which is suspended from the ceiling and formed as an air distributor.

The air being blown in a free jet into the aeration device mixes partially with the room air before it enters the aeration device and is blown out there through distribution nozzles into the room.

The disadvantage of this arrangement is that there is no false ceiling, and instead an air distributor is suspended on the story ceiling, which is connected with a great expense. Another disadvantage is that undesired turbulences are generated by the free jet injection of the primary air using a fan at the upper side of an air distributor, which lead to an undesirable noise impact in the room. Through the free jet injection on the upper side of the room air distributor, an air cylinder extended over the entire room volume is formed, which leads to undesirable floor and air speeds.

The object of the invention is to develop a method and a device executing the method for temperature controlling of rooms with suspended false ceilings according to EP 1 325 268 B1 or DE 40 15 665 C3 such that a low-draft room climate is achieved with significantly lower tempering output.

To achieve the object, the invention is characterized by the technical teaching of claim 1.

An essential feature of the invention is a method, the implementation of which produces the advantage that a low-turbulence flow is achieved in the room with relatively low air speeds and that the heating or cooling capacity of a story ceiling is used due to the mixing of the primary and secondary air flow in the space between the story ceiling and the false ceiling for air conditioning—or more generally, for the temperature controlling.

With the invention in question, it is thus proposed that a primary air flow in the ceiling cavity above a false ceiling is directed through a nozzle duct being laid in the ceiling cavity and being arranged approximately parallel to the story ceiling through primary air nozzles on the underside—being arranged on the nozzle duct—against the upper side of the false ceiling and namely against the air inlets in the false ceiling, which are directed into the room.

The ventilation principle of the invention makes use of an air induction. This effect means that introduced primary air carries away and thereby mixes other existing air. In the ventilation and air conditioning technology, air inlets are used for dilution ventilation, which can mix considerable quantities of room air with the incoming primary air. After this effect takes place in the area of a ceiling cavity above a false ceiling connecting a room upwardly, a laminar, draft-free flow is achieved in the room.

With this technical teaching, there is the advantage that a primary air flow is generated in the area of the ceiling cavity, which is directed against the upper side of the false ceiling and (air-carrying) air inlets arranged there, wherein the primary air flow flows into the room through the air inlets being positioned on the false ceiling side and a vacuum is created in the ceiling cavity due to the flow conditions, which ensures that room air is vacuumed into the ceiling cavity through porosities in the ceiling cavity, which mixes as secondary air flow in the ceiling cavity with the primary air flow, and is then discharged into the room.

The advantage of this measure is that the room air is assigned a greater exchange surface, because an enlarged thermal exchange surface (available there) is achieved for the temperature controlling of the room air by introducing the room air into the ceiling cavity, and thereby a more consistent and better temperature controlling of the room air is possible. The thermal capacity of the story ceiling being covered by the false ceiling in the ceiling cavity and the thermal capacity and cooling capacity of the false ceiling are utilized.

The advantage of this measure is that the admixture of a primary air flow (induction air flow) and an (induced) secondary air flow being vacuumed from this out of the room air takes place in the ceiling cavity itself. This is connected to the advantage that the underside of the story ceiling can also be used as an air conditioning or thermal distribution surface, so that an additional, high thermal capacity can thereby be used, because the thermal capacity of the story ceiling of a building is used additionally for the temperature controlling of the secondary air flow.

In the prior art, the admixture of a secondary air flow always occurred in the room itself, namely beneath the ceiling cavity in the room and not—as with the invention—above the ceiling cavity in the area between the upper side of the false ceiling and the underside of the story ceiling.

With the stated technical teaching, there is the advantage that now the thermal capacity (or cooling capacity) of a potentially temperature controlled story ceiling can be used for the first time, and that therefore the false ceiling can also be temperature controlled, which was only previously possible by means of expensive additional measures.

A particularly low-turbulence distribution into the room of the primary air flow and the secondary air flow being admixed there occurs due to the air inlets in the false ceiling being distributed over a very large surface of the false ceiling.

It is preferable if the air inlets extend over about two-thirds or half of the length of the individual ceiling panels, wherein the profile shape, length and arrangement of the air inlets can be modified within wide limits.

In a particular embodiment of the invention, it is preferred that the air inlets, which penetrate the ceiling panels air-tightly, are formed as air diffusers.

This requires in each case that the primary air jet, which is directed from the primary air nozzles of the nozzle duct against the upper side of the false ceiling, approximately flushly hits the air inlets. The air inlets are preferably made of a conically widening profile. Through the directed injection of the primary air flow into the air inlets being positioned on the false ceiling side and conically widening towards the room side, a radical reduction of the air speed occurs in their area.

The air speed of the primary air entering the diffuser opening of the air inlet is initially large. When passing through the diffuser opening, the air speed of the primary air is greatly reduced and a vacuum effect of room air is achieved, which is vacuumed into the ceiling cavity from the room.

If the primary air enters the room through the air inlet in the false ceiling, then it has only for example a speed of 2 meters per second, while the speed of the primary air flow on the inlet side is approximately in the range between 10 to 12 meters per second.

It is particularly advantageous that an induction rate of 10 or more is achieved by the induction of the nozzle duct in the ceiling cavity. It is thus possible, for example, to mix 10 parts of the secondary air being drawn from the room with a temperature of, for example, 24° C. with 1 part of the primary air of, for example, 12° C., which leads to a discharge of the mixed air into the room with a temperature difference to the room temperature of one degree Kelvin.

As an example for the dimensioning of a cooling ceiling as per the invention with a so-called “Hybrid Eco Boost”, it is stated that the primary air with a volume in the range of 6 cubic meters per hour and per square meter of floor surface of the room up to an air quantity of 7.2 cubic meters per hour and per running meter is emitted from the primary air nozzles of the nozzle duct.

The slit length or the slit cross-section of the primary air nozzles is considerably greater in comparison to the slit cross section and the slit profile shape of the supply air slits flowing approximately flushly from the primary air nozzles being positioned of the ceiling panel side.

When a slit width of the primary air nozzles of 1 mm, the air inlets (or supply air slits) being arranged flushly on the false ceiling side have a slit width of 12 mm.

The surface ratio of the outflow surface of the primary air nozzles in comparison to the surface of the supply air slit or air inlets is approximately 1:160. The distance between the outflow side of the primary air nozzles and the inlet side of the air inlets being arranged vertically opposite on the false ceiling side is 56 mm in a preferred exemplary embodiment. The air-carrying (vertical) total length of the air inlets penetrating the false ceiling is preferably 17.9 mm. Each air inlet consists preferably of a conical section arranged on the inlet side, which merges into a cylindrical section directed into the room. The conical section being positioned on the inlet side has a diameter of 42 mm, for example, with a vertical length of 7 mm, for example. The cylindrical section being directed into the room and connecting air-tightly has a diameter of 12 mm, for example, with a vertical length of 11 mm, for example.

From these proportions, it is furthermore apparent that with a relatively low tempering output of the primary air, which flows in for example with a temperature of 10° C., an optimum temperature controlling of the room air occurs because only 1 part of the primary air is mixed with 10 parts of the secondary air coming from the room and a low-turbulence introduction into the room occurring with low air speed through the false ceiling takes place.

The primary air nozzles form a mixing zone being arranged in the ceiling cavity for mixing between the primary air and the secondary air. As an exemplary embodiment, it is specified that a primary air flow with a volume of about 66.6 cubic meters per hour and each relating to a square meter of floor space of the room to be temperature controlled is produced, wherein the temperature attained in the mixing zone of the secondary air flow (which comes from the room air) has a temperature of about 26° C.

In the air inlets being on the outlet side of the false ceiling, which flows into the room on the ceiling-side, an air flow of, for example, 72.6 cubic meters per hour per square meter of room surface is thereby produced, wherein this air for example is temperature controlled at a temperature of 24.7° C.

This results in the advantage of the invention that with a low air proportion of primary air, which can be cooled down to a low temperature, for example at 10° C., a low-turbulence, low-draft room temperature can be generated in the range between 22 to 24 degrees Celsius.

A further advantage is that, when the building outer temperature is relatively cold, it is then sufficient to blow the primary air sucked in from the outside air with this low temperature into the nozzle duct and to initiate an admixture of secondary air in the ceiling cavity before the mixed air is introduced into the room. Since the induction air ratio lies in the range between 5 and 20, preferably between 8 and 12 and particularly preferably at 10, it is sufficient to mix 1 part of the primary air with 10 parts of the room air.

The advantage of this measure is that the air sucked in from the building environment with low temperature must not still be additionally heated, which is the case with other temperature control methods.

Because only a small proportion of the primary air potentially being temperature controlled at a low temperature is mixed with the secondary air, it is sufficient therefore to admix the primary air with a relatively low temperature, because, for example, the induction number is 10 or more.

For clearer description, reference numerals are used below, which can be seen from the accompanying drawing legend.

It is particularly advantageous when the primary air in the form of a pointed core zone 37 with high speed flows from the primary air nozzles 36 of the nozzle duct 25, and is directed flushly to the diffuser openings of the air inlets 41 being positioned on the false ceiling side. Accordingly, this is a free jet on the primary air side, whose jet distribution initially occurs in the form of an acute-angled round or flat jet core, which subsequently passes into a mixing zone—with a larger distance from the outlet opening.

In the area of the pointed rounded or flat jet core, a laminar jet path of primary air is produced and a turbulent jet path is produced in the longitudinally adjoining mixing zone. The jet axis of the primary air nozzle 36 is directed flushly against the air inlet 41 on the false ceiling side and the distance between the core zone 37 being on the primary air nozzle side, which produces the core jet, and that of the diffusor 43 being positioned on the false ceiling side and absorbing the primary air flow 40 is selected such that the mixing zone being formed in the axial direction on the core jet of the primary air flow extends into the diffuser 43 being positioned on the false ceiling side. This consequently ensures that the air induction takes place in the ceiling cavity, i.e. above the false ceiling and not below the false ceiling.

Due to this flush juxtaposition of the primary air nozzles 36 to the air inlets 41 being positioned on the false ceiling side, a diffuser effect is produced such that the maximum possible negative pressure occurs in the mixing zone between the outlet of the primary air nozzles and the input of the air inlets being arranged on the false ceiling side, and thereby the maximum negative pressure is used for the admixture of the secondary air flow.

It is important that the secondary air flow is obtained entirely from the room air, and namely through porosities in the false ceiling 31. It is necessary that a false ceiling 31 covers the entire story ceiling 29 and that a ventilation separation is thereby created between a story ceiling 29 and a room 4 to be temperature controlled. The false ceiling 31 can consist of individual ceiling panels 8, 9 forming a consistent room ceiling. Instead of individual ceiling panels interconnected by connecting and supporting profiles, a consistent panel, a fabric web or other web-like or panel-like structures can be used. These web-like or strip-like structures should be at least partially air-permeable.

Such porosities may be generated in various ways.

In a first embodiment of the invention, it is provided that the distance joints longitudinally limiting the ceiling panels are at least partially open, for example, have a cross-section of 5 mm and extend over the entire length of the ceiling panel of, for example, 1.20 to 1.50 m.

Thereby, slit-like porosities are produced longitudinally and peripherally to the ceiling panels, through which the room air is sucked from the room into the ceiling cavity, and admixed with the primary air flow here as secondary air flow.

In another embodiment of the invention, it is provided that the porosities in the false ceiling are produced by distance joints existing on the lateral sides of the ceiling panels and being open along the edges.

In a third embodiment of the invention, it is provided that openings are provided in the ceiling panels themselves, through which the room air is sucked into the ceiling cavity. Such openings may be formed as slits, holes, perforations or the like.

In a fourth embodiment of the invention, it is provided that the ceiling panels are intrinsically impermeable to air, but that specific porosities are attached to the room joints on their wall side, as open joints for example or the like.

In a further embodiment of the invention, it is moreover provided that the heat or cold of the story ceiling is used for temperature controlling the air flow fed into the ceiling cavity.

In the first, previously described embodiment, it was assumed that the story ceiling is at a normal temperature, which corresponds to the temperature of the entire building.

In a second embodiment, it is provided that the story ceiling is additionally cooled. Here, it is particularly advantageous when additional temperature controlling registries are arranged in or on the story ceiling. It is particularly advantageous if the arrangement of temperature controlling registries in the story ceiling itself are surrounded completely by the concrete in the story ceiling.

This results in the advantage that the story ceiling during night time—at relatively low external temperatures—can be cooled, and this cooling is turned off with the start of the operating period. The story ceiling then remains in the cooled state due to its thermal capacity and additionally cools the mixed air produced in the ceiling cavity before this is injected into the room.

The air quantity of the primary air is regulated depending on the room load, which means that with a high temperature in the room a larger amount of cooled primary air is supplied than comparatively at a lower temperature.

It is particularly advantageous in this exemplary embodiment that the heating or cooling capacity of the potentially cooled (or generally temperature controlled) story ceiling is additionally used for temperature controlling the secondary air arising from the room air, and all air mixtures occur in the ceiling cavity and not in the room itself, which could lead to intolerable drafts.

By controlling the primary air volume, the heat output or the heat absorption of the story ceiling to the room is variable. Thus, the room temperature can be regulated.

In a conventional concrete core temperature control system, this is not possible, because the heat output is determined by the heat-generating elements in the room and cannot be regulated as a function of the thermal capacity of the story ceiling.

In a third exemplary embodiment of the invention, it is provided that the story ceiling itself is not temperature controlled, but rather the false ceiling is.

As per the invention, with this exemplary embodiment, temperature controlling registries are laid on or in the false ceiling, which conduct a media flow along, which preferably absorbs a cooled or heated heat transfer medium as a liquid flow.

The advantage of this measure is that the false ceiling has a dual benefit, namely as the ventilation separation of a mixing room, which is arranged in the ceiling cavity underneath the story ceiling and above the room, and that the false ceiling itself is formed as a cooling or heating ceiling.

The cooling or heating capacity of the false ceiling is massively increased by the dual exchange surface to the room and to the side being positioned on the ceiling cavity side.

Another advantage of the invention is that, during night-time operation, the temperature controlling registries used to cool the false ceiling also simultaneously cool the underside of the story ceiling, charging with a certain cooling volume, which can then be emitted again during day-time operation.

This advantage results from the technical teaching as per the invention that a mixing of a primary air flow with a secondary air flow originating from the room air occurs in the cavity between the false ceiling and the story ceiling.

The object of the invention of this innovation arises not only from the subject of the individual patent claims, but also from the combination of the individual patent claims among themselves.

All information and characteristics disclosed in the documents, including the summary, specifically the spatial distribution shown in the drawings, are claimed as essential to the invention, insofar as they are individually or in combination new compared to prior art.

In the following, the invention is explained in more detail by means of drawings illustrating just one embodiment. Here, other key characteristics and advantages of the innovation emerge from the drawings and their description.

In the drawings:

FIG. 1: shows an aerial view of the room side on a first embodiment of a false ceiling

FIG. 2: shows the same representation as FIG. 1 with visualization of additional ventilation details

FIG. 3: shows the bottom view of a room according to FIGS. 1 and 2

FIG. 4: shows in a schematic sectional view and greatly enlarged the admixture of a primary air flow in the ceiling cavity with a secondary air flow

FIG. 5: shows the aerial view of the arrangement as per FIG. 4 with only the representation of the primary air nozzles in comparison to the supply air slits being positioned on the false ceiling side

FIG. 6: shows a perspective representation of the air routing as per FIGS. 1 to 5 in a first exemplary embodiment

FIG. 7: shows a perspective representation with a view of a false ceiling with the arrangement of differently formed air inlets

FIG. 7a : shows differently formed air inlets in comparison to FIG. 7

FIG. 7b : shows a modified exemplary embodiment in comparison to FIG. 7a

FIG. 7c : shows a modification in comparison to FIGS. 7a and 7b

FIG. 7d : shows a further embodiment of the supply of room air on the upper side of the false ceiling

FIG. 7e : shows further exemplary embodiments for the supply of room air in the ceiling cavity of the false ceiling

FIG. 8: shows a sectional view of an exemplary embodiment modified in comparison to FIG. 3 with the temperature controlling of a story ceiling

FIG. 9: shows an aerial view of the arrangement of the false ceiling as per FIG. 8

FIG. 10: shows an exemplary embodiment modified in comparison to FIG. 8, in which the false ceiling is additionally temperature controlled

FIG. 11: shows the aerial view of the arrangement as per FIG. 10

In FIG. 1, a room to be generally temperature controlled and ventilated is shown, wherein such rooms may be, for example, administrative buildings, offices, rooms of a shopping mall, residential premises, multi-purpose rooms, sports rooms, meeting rooms or conference rooms.

It is only schematically shown that such a room is defined by a corridor 1, which comprises separating corridor walls 2, which are penetrated by door elements 3. The door elements 3 each lead into a room 4, which should be temperature controlled or—generally—cooled and heated as per the invention.

The room is defined by lateral partition walls 5, which end in façade columns 7 on the facade side. Windows 6 are arranged between the façade columns 7.

The ceiling side of the room 4 is formed by a false ceiling 31, which is formed from a plurality of closely abutting ceiling panels 8, 9.

The ceiling panels 8 are formed rectangularly in the illustrated exemplary embodiment and have, for example, a size of 0.6 m×1.70 m.

The ceiling panels 8 are not necessarily rectangular. They can take any form. They can be oval, round, trapezoidal, triangular, or profiled in another way. It is important that, in a preferred exemplary embodiment of the invention in question, two different types of ceiling panels are used, namely ceiling panels 9, which are not provided with a longitudinal slit, and further ceiling panels 8 comprising a longitudinal slit, which shall be subsequently referred to as supply air slit 42.

In the illustrated exemplary embodiment, the longitudinally abutting ceiling panels 8, 9 comprise open distance joints 10, which extend preferably over the entire length of the abutting ceiling panels 8, 9 and have a width of, for example, 5 mm.

The distance joints 10 are permeable to air and open into the room. The abutting transverse joints of the ceiling panels 8, 9 are impermeable to air in the illustrated exemplary embodiment.

According to FIG. 2, an air distributor system 12 opens into the room, which consists substantially of a main duct 15 extending on the corridor side, which produces an air flow 14 in outlet pipes 13 branching from this.

The air flow 14 is initially fed into a volume flow controller 16, at whose output a silencer 17 is arranged feeding into a supply duct 18, which feeds the such conditioned primary air flow in the direction of the arrow 19 in one or a plurality of distributor pipes 20 leading into the room.

In the exemplary embodiment, only one distributor pipe 20 feeding into the room 4 is shown. The invention is not limited to this. A plurality of parallelly arranged distributor pipes can also be arranged.

In the exemplary embodiment shown, the distributor pipe 20 is air-tightly connected with one or a plurality of transverse pipes 22, wherein the one or a plurality of transverse pipes 22 is connected with one or a plurality of distributor pipes 21.

The type of air distribution into the room 4 is thus represented arbitrarily and can be modified in many ways.

The primary air being supplied into the room in the direction of the arrow 19 via the distributor pipes 20, 21 divides the air flow 40 into a plurality of nozzle ducts branching vertically or at least at an angle from the distributor pipes 20, 21 and connecting air-tightly via connecting branches 23 with the distribution pipes 20, 21.

The nozzle ducts 25 have a structurally identical construction. However, because they are located locally at different points in the room 4, they are labelled 25 a, 25 b, 25 c, 25 d.

In the illustrated exemplary embodiment, for example, the nozzle duct 25 d being located on the window side ends parallel to the window 6.

FIG. 3 shows the sectional representation of the structure according to FIGS. 1 and 2. It can be seen that the air distribution system 12 is arranged in the corridor suspended ceiling 24 in corridor 1, and the air routing elements are arranged in a ceiling cavity 30, which is formed by a false ceiling 31 being installed in the room and completely covering the story ceiling to the bottom.

In the area of the ceiling cavity 30, the mixing of the primary air flow 40 occurs with a secondary air flow 33 being sucked into the ceiling cavity 30 from the room air flow 32.

An induction air flow is thereby generated, which is shown as primary air in FIG. 3 with the reference numeral 40, which enters the room through allocated air inlets 41 being arranged in the false ceiling 31, wherein the speed profile of the tertiary air flow 34 being fed into the room is also shown in FIG. 3. It can be seen that the speed profile of the tertiary air flow 34 decreases greatly at a distance from the air inlets 41 being located on the false ceiling side. The air inlets 41 being located on the false ceiling side are designed preferably as slit openings, wherein the air speed initially arising in the air inlet 41 of two meters per second decreases to about 0.15 meters per second at a distance from this air inlet 41.

This produces the evidence that a low-turbulence, relatively draft-free room air is produced in the form of a ventilation and temperature controlling with a tertiary air flow 34. The tertiary air flow 34 consists of a temperature controlled primary air flow 40 and a secondary air flow 33 being extracted from the room air flow 32.

In FIG. 3, it can be seen that the room air flow 32 is sucked through porosities in the false ceiling 31 into the ceiling cavity 30 and is admixed to the primary air flow 40 here as secondary air flow 33.

Such porosities are, for example—as mentioned in the general part of the description—the distance joints 10 between the ceiling panels 8, 9.

In the exemplary embodiment according to FIG. 4, the admixture of a secondary air flow 33 to the primary air flow 40 and the resulting production of a tertiary air flow 34 is shown schematically.

Starting from the nozzle duct 25, a number of primary air nozzles 36 arranged at intervals to each other are arranged on the floor side of the nozzle duct, which are formed as round nozzle openings with a diameter, for example, of 1 mm.

The invention is not limited to this. Instead of round profiled primary air nozzles 36, rectangular, triangular or otherwise profiled primary air nozzle cross sections can also be used.

It is important that the primary air flow supplied from the primary air in the direction of the arrow 51 into the nozzle duct 25 has, for example, a temperature in the range of 10° C. to 12° C., and is thus cooled or at least temperature controlled.

The primary air flow emitted via the primary air nozzles 36 is radiated in a downwardly vertically directed, pointed core zone 37 in the direction of the upper side of the false ceiling 31.

The wave forms in FIG. 4 show the speed profile of the mixing air flow, which is formed from the primary air flow 40 with the secondary air flow 33 sucked into the ceiling cavity 30.

An air vacuum effect occurs through the forced blowing out of the primary air from the primary air nozzles 36 and through the direction of the primary air flow 40 against the air inlets 41 being arranged in the false ceiling 31.

In a preferred embodiment, the air inlets 41 are formed as air diffusers. The conically tapering profile 44 of the air inlets 41 being formed as air diffusors is formed by a first, approximately horizontal leg 45, which passes at an angle into an adjoining, diagonally directed leg 46, which in turn passes into a vertical leg 47.

A conically tapering profile of the diffuser 43 is thereby formed, which narrows from the inlet opening in the direction of the outlet opening. This results in a vacuum effect for the room air flow 32, which is sucked through porosities in the false ceiling 31 into the ceiling cavity 30.

The room air flow 32 is thereby sucked into the ceiling cavity 30 and is admixed to the primary air flow 40 as secondary air flow 33 in the area of a mixing zone 38.

The mixing zone 38 is designed preferably in a conically widening form and is formed by two mutually angularly arranged lines 39, wherein the lines 39 should meet approximately on the inclined legs 46 of the air inlets 41 being formed as diffusers 43.

An optimal vacuum effect of the secondary air flow 33 and an admixture in the primary air flow 40 in the area of the mixing zone 38 thereby occurs.

Instead of the embodiment of air inlets 41 in the false ceiling 31 as diffusers 43, other cross-sectional shapes are also provided.

The diffuser 43 is not a nozzle, since a reduction of the air speed occurs and the air should flow as uniformly as possible and low-turbulence into the room 4. Accordingly, the mixing ventilation is virtually free from turbulence.

Instead of the conically tapering shape of the diffuser shown here, other forms are also conceivable.

The cross-section of the diffuser 43 can also be designed purely cylindrically, and the diffuser 43 in the illustrated exemplary embodiment is formed with the profile 45 as a slit opening, as shown.

Instead of a slit opening, other diffusor lengths and cross sections can also be chosen—as explained later.

FIG. 5 shows the size ratio of the nozzle cross-sections of the primary air nozzles 36 compared to the cross-section of the supply air slits 42, which are formed as diffusers 43.

A size ratio of about 1:100 is used here. It is furthermore clear that there is no nozzle-like effect in the diffuser 43 (supply air slit 42).

Furthermore, FIG. 5 shows that air-impermeable disconnection parts 49 exist piecewise between the supply air slits 42, through which no air flows.

FIG. 6 schematically shows the arrangement according to FIGS. 4 and 5 in a perspective representation. Here it can be seen that, starting from the distributor pipe 20, 21, the primary air is introduced in the direction of the arrow 19 in the nozzle duct 25 running parallel to the longitudinal direction of the ceiling panels 8, 9, and flows along there in the direction of the arrow 51 and flows out here from the primary air nozzles 36 arranged on the bottom side of the nozzle duct 25. This occurs in the form of the primary air flow 40, which has the speed profile 35 according to FIG. 4.

The primary air flow 40 forms a mixing zone 38, into which the secondary air flow 33 is sucked. The secondary air flow 33 originates from the room air flow 36, which is vacuumed through the porosities, for example the distance joints 10 in FIG. 6.

The transverse joints 11 are air-impermeable in the illustrated exemplary embodiment.

However, in another, not shown exemplary embodiment, it can also be provided that the longitudinally extending distance joints 10 are air-impermeable and the transverse joints 11 are air-permeable.

Furthermore, it can be seen from FIG. 6 that the room air is vacuumed through the air inlets 41 interrupting the false ceiling 31, wherein the air inlets are formed as supply air slits 42 in the illustrated exemplary embodiment. They have air-impermeable disconnection parts 49, which are material sealed to preserve the ceiling panels 8 in their integrity and flexural strength.

The distance 58 between the nozzle duct 25 and the parallel supply air slit 42 can be modified within wide limits. In this way, the supply air slit 42 penetrating the false ceiling 31 can extend the width of the ceiling panel 8 in the center or a one third or two thirds.

In any case, it is important that the nozzle duct 25 is located (lushly over the supply air slits 42 arranged in the false ceiling 31, as FIG. 4 shows, in order to achieve a centric and targeted air radiation of the primary air flow in the direction of the air diffusor 43 in the false ceiling, in order to achieve the mixing of a secondary air flow 33 to the primary air flow 40 in the ceiling cavity 30.

FIG. 7 shows as a modification that not only the supply air slits 42 can be present in the false ceiling 41. Instead of this, air inlets 41 a deviating from the slit shape can also be arranged instead of the supply air slits 42, which are oval or round in the illustrated exemplary embodiment and are spaced apart from each other.

The primary air flow 40 is directed targetedly into the air inlets 41, 41 a.

The air inlets 41, 41 a do not have to just be laid parallel in a line to the lateral boundaries of the respective ceiling panel 8, 9. They can also be directed lengthways to an alignment line 52, 52 a, 52 b, which extends anti-parallel to the longitudinal side of the respective ceiling panel 8, 9. The alignment lines 52 can also form a certain alignment angle 53 to each other.

The exemplary embodiment shows that the room air 32 is vacuumed to the open distance joints 10.

The invention is not limited to this.

FIG. 7d also shows that the room air 32 can be vacuumed to the—then open—transverse joints 11.

FIG. 7a shows that, instead of the round or oval air inlets 41, 41 a, rectangular air inlets 41 b can also be provided.

FIG. 7b shows that he air inlets 41 c can also be triangular or otherwise profiled.

FIG. 7c shows that any profiled air inlets 41, 41 a, 41 b, 41 c, 41 d can also proceed lengthways to an arched alignment line 52 c, with the proviso (for all exemplary embodiments) that the nozzle duct 25 also follows this alignment line 52 c and is aligned flushly opposite.

FIG. 7e shows different embodiments, as room air from the room air flow 32 can be sucked into the ceiling cavity 30 on the upper side of the ceiling panels 8. In the left part of FIG. 7e , it is shown that the room air is vacuumed through air-tightly open transverse joints 11 between the ceiling panels 8, 9. Furthermore, it is shown that the air inlets 41 are formed as supply air slits 42.

The middle part of FIG. 7e shows that the ceiling panels 8, 9 can also be completely impermeably connected to each other, and absolutely no air-tight opening is present, with the exception of the ceiling panels 59 penetrating the ceiling panels 8, 9, which can be profiled in any desired manner and through which the room air is sucked as a room air flow 32 b.

Furthermore, it can be deduced from FIG. 7e —from the left representation—that the ceiling panels 8, 9 can be completely air-tightly connected together both longitudinally and transversely, and only an air space is provided on the connection side 61 on the room side.

The wall connection side 61 can be air-open, and the room air 32 can only vacuumed to the wall connection sides of the entire false ceiling 31.

The air-permeable wall connection side 61 can either be provided on the narrow side or on the wide side of the false ceiling 31, or the air-tight opening of the false ceiling can be provided peripherally on all wall connection sides 61.

Such air-open wall connection sides 61 are shown, for example, in FIG. 1.

FIG. 8 shows an exemplary embodiment modified in comparison to FIGS. 1 to 7, which only differs from the aforementioned exemplary embodiments by the temperature controlling in the story ceiling 26. With this concrete core temperature control, tempering pipes 54 are laid in the story ceiling 26, which provide cooling or heating of the story ceiling 26.

Thus there is the advantage that, for example in night hours, if the room 4 is not occupied, the story ceiling 26 can be temperature controlled using the tempering pipes 54, and the mixed air flow produced in the ceiling cavity 30 additionally flows along to the underside of the story ceiling 26, is temperature controlled there, mixes as the mixed air flow (secondary air flow 33) with the room air, is admixed to the primary air flow 40 and flows as a tertiary air flow 34 into the room with the speed profile illustrated in FIG. 8.

The advantage of this measure is that during the night hours the story ceiling 26 is temperature controlled and the temperature controlling is no longer necessary during daytime operation.

Another advantage is that the temperature control circuit 56 is formed controllably with the main pipes 55, such that any temperature controlling of the story ceiling 26 can take place during the day or night.

FIG. 9 shows the aerial view of the arrangement according to FIG. 8, where it can be seen that a plurality of tempering pipes 54 are arranged in the story ceiling 26, and the surface of the tempering pipes 54 extends over the entire surface of the room.

FIG. 10 shows as a further modification to FIG. 8 that instead of the temperature controlling of the story ceiling 26, a temperature controlling of the false ceiling 31 takes place, on which or in which a number of temperature controlling registries 57 is laid, such that the false ceiling 31 can be optionally cooled or heated.

This is carried out by an adjustable temperature control circuit.

An advantage of the arrangement according to FIG. 10 is that concrete core temperature control with a temperature controlling installed into the story ceiling 26 can be avoided, because by temperature controlling the false ceiling 31 an underside layer 26 a (underside or room side) of the solidly constructed story ceiling 26 is additionally temperature controlled and assumes a different temperature to the upper side of the false ceiling, for example.

The underside 26 a of the story ceiling 26 is thereby also used for temperature controlling the ceiling cavity 30, such that the secondary air flow 33 originating from the room air flow 32 is lead to the additionally temperature controlled underside 26 a of the story ceiling 26, further cooled or heated there, and then admixed as a secondary air flow 33 to the primary air flow 40 and reintroduced into the room as a tertiary air flow 34.

FIG. 11 shows the embodiment of the arrangement according to FIG. 10, where it is apparent that the temperature controlling registries 57 only occupy a part of the room surface, for example only 40% of the bottom surface of the room 4.

An advantage to the method as per the invention and the device working with the method is that a draft-free and turbulence-free temperature controlling of rooms can take place with significantly lower tempering expense, because the actual mixing procedures between a primary air flow and a secondary air flow take place in the ceiling cavity 30 separated from the room above a false ceiling 31.

All rooms can thereby be regulated independently depending on the load, because the variable volume flow of the primary air flow is the dominating tempering factor, which can be simply defined by regulating the volume flow controller.

Higher cooling capacities result thereby because large exchange surfaces are provided, since at least the underside 26 a of the story ceiling 26 or the entire story ceiling 26 itself or even all surrounding surfaces, which define the ceiling cavity 30, are used as heat exchange surfaces. This was not the case in the prior art.

For simpler description, the parts provided with reference numerals are not additionally labelled with their lower case letters a, b, c, d in the following patent claims, although the so labelled parts are also included in the scope of protection of the patent claims.

DRAWING LEGEND

1 Corridor

2 Separating corridor wall

3 Door element

4 Room

5 Partition walls

6 Window

7 Facade supports

8 Ceiling panel (longitudinal slit)

9 Ceiling panel (without slit)

10 Distance joint (open)

11 Transverse joint

12 Air distribution system

13 Outlet pipe

14 Direction of arrow

15 Main duct

16 Volume flow controller

17 Silencer

18 Supply duct

19 Direction of arrow

20 Distributor pipe

21 Distributor pipe

22 Transverse pipe

23 Connecting support

24 Corridor suspended ceiling

25 Nozzle duct 25 a, b, c, d

26 Story ceiling 26 a Underside

27 Room floor

28 Cavity

29 Story ceiling

30 Ceiling cavity

31 False ceiling

32 Room air flow 32 b

33 Secondary air flow

34 Tertiary air flow

35 Speed profile a, b, c

36 Primary air nozzles (in 25)

37 Core zone (of 40)

38 Mixing zone

39 Line

40 Primary air flow

41 Air inlet

42 Supply air slit

43 Diffusor

44 Profile

45 Leg

46 Leg

47 Leg

48 Angle (of 39)

49 Disconnection part

50

51 Direction of arrow

52 Alignment line a, b, c

53 Alignment angle

54 Tempering pipe

55 Main pipe

56 Temperature control circuit

57 Temperature controlling registry

58 Interval

59 Ceiling panel opening

60 Tempering air flow (of 33) 60 a

61 Wall connection side 

1. A method for ventilating and temperature controlling rooms according to the principle of dilution ventilation, wherein the thermal capacity of a story ceiling being covered by a false ceiling (31) in the ceiling cavity is thereby utilized, that the false ceiling (31) covers the entire story ceiling (29) and that thereby a ventilation separation is created between the story ceiling (29) and a room (4) to be temperate controlled, wherein a primary air flow (40) is introduced into the ceiling cavity (30) of a room (4), which is partitioned from a story ceiling (26) by the false ceiling (31) and is introduced into the room (4) by means of air inlets (41, 42, 43) in the false ceiling (31), wherein the primary air flow (40) in the ceiling cavity (30) produces a secondary air flow (33) as an induction air flow, which vacuums a room air flow (32) from the room (4) into the ceiling cavity (30), mixes with the secondary air flow (33) and introduces it into the room (4) as a tertiary air flow (34) through the air inlets (41, 42, 43) in the false ceiling (31).
 2. A method according to claim 1, characterized in that the primary air flow (40) is directed as an induction air flow targetedly against the air inlets (41, 42, 43) in the false ceiling (31) and produces the secondary air flow (33) vacuuming the room air (32).
 3. A method according to claim 1, characterized in that the thermal capacity and cooling capacity of the false ceiling are utilized.
 4. A method according to claim 1, characterized in that during the night-time operation the temperature controlling registry used for cooling the false ceiling also simultaneously cools the underside of the story ceiling, and recharges with a certain cooling quantity, which is reemitted during the day-time operation.
 5. A method according to claim 1, characterized in that the heat output or heat absorption of the story ceiling is amendable to the room by regulating the primary air volume.
 6. A device for ventilating and temperature controlling rooms according to the principle of dilution ventilation, wherein the thermal capacity of a story ceiling being covered by a false ceiling (31) in the ceiling cavity can be utilized, that the false ceiling (31) covers the entire story ceiling (29) and that thereby a ventilation separation is created between the story ceiling (29) and a room (4) to be temperate controlled, wherein a primary air flow (40) can be introduced into the ceiling cavity (30) of a room (4), which is partitioned from a story ceiling (26) by a false ceiling (31) and is introduced into the room (4) by means of air inlets (41, 42, 43) in the false ceiling (31), wherein at least one nozzle duct (25) conducting a primary air flow (40) is arranged in the ceiling cavity (31), which feeds a primary air flow (40) directed targetedly against the air inlets (41, 42, 43) on the false ceiling side through primary air nozzles (36) being arranged on the underside.
 7. A device according to claim 6, characterized in that the primary air flow in the ceiling cavity (30) produces a secondary air flow (33) as an induction air flow, which vacuums a room air flow (32) from the room (4) through porosities into the false ceiling (31) into the ceiling cavity (30), mixes with the secondary air flow (33) and introduces it into the room (4) through porosities (41, 42, 43) in the false ceiling (31).
 8. A device according to claim 6, characterized in that at least some of the air inlets in the false ceiling (31) are formed as diffusors (43).
 9. A device according to claim 8, characterized in that the diffusor (43) consists of a conical section being arranged on the inlet side, which passes into a cylindrical section being arranged on the outlet side.
 10. A device according to claim 6, characterized in that the primary air as a free jet in the form of a pointed core zone (37) with high speed flows from the primary air nozzles (36) of the nozzle duct (25), and is directed flushly to the air inlets (41) being positioned on the false ceiling side.
 11. A device according to claim 6, characterized in that the false ceiling (31) and/or the story ceiling (29) is/are temperature controlled.
 12. A device according to claim 6, characterized in that the air-carrying porosities in the false ceiling (31), through which the room air flow (32) is sucked into the ceiling cavity (30), are formed as distance joints (10) between ceiling panels (8, 9) of the false ceiling.
 13. A device according to claim 6, characterized in that additional temperature control registers are arranged in the story ceiling.
 14. A device according to claim 6, characterized in that the air guide elements are arranged in a ceiling cavity (30), which is formed by a false ceiling (31) being installed in the room and completely downwardly covering the story ceiling.
 15. A device according to claim 6, characterized in that at least the underside (26 a) of the story ceiling (26) or the entire story ceiling (26) itself or even all surrounding surfaces, which define the ceiling cavity (30) work as thermal exchange surfaces. 